[time-nuts] Fury Interface Board: How about TI OPA277?

David Forbes dforbes at dakotacom.net
Thu Nov 1 23:38:41 EDT 2007


At 9:09 PM -0600 11/1/07, xaos at darksmile.net wrote:
>It is funny how things you forgot a long time ago have a way of coming back.
>
>Case in point. I was just running some simulations on the EFC
>interface and then I had this idea.
>
>Wouldn't an instrumentation amplifier be the right way the isolate the
>Fury EFC    voltage?
>
>For instance, the Burr Brown INA 103. It would provide for isolation
>as well as gain. Not sure of all the details yet.
>
>I remember using this device for a thermocouple a few years back. And
>I even managed to find a few of them in a box somewhere.

The AD620 or LT1167 is a fine little instrumentation amp. 8-pin 
package. Very easy to use, good specs.


>There is no question that he TL431 is not right here. I am already
>running the simulation with an LM128 or such. PSPICE only has the
>LM128 so I am just testing this out.
>
>-George

The REF19x series is very good at this sort of job. Also 8 pins.

-- 

--David Forbes, Tucson, AZ
http://www.cathodecorner.com/



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